[BUG]: Table view toggle button gets enabled for Heatmap chart

[pratibhapandey16]

What is the bug?
After removing stats from the PPL query when we select Heatmap chart from the chart selector the table view gets enabled and when we click on table view toggle button the page turns blank

How can one reproduce the bug?
Steps to reproduce the behavior:

1. Go to Observability/Event Analytics/Explorer page
2. Navigate to Visualizations page
3. Remove stats section from the PPL query and click on Refresh button
4. Select the Heatmap chart option from chart selector dropdown
5. Click on table view toggle button
6. Observe the issue

What is the expected behavior?
If we don't have stats in the PPL query then the table view toggle button should be disabled

Do you have any screenshots?

@anirudha @mengweieric
cc: @abasatwar @spattnaik

[pratibhapandey16]

Bug has been fixed and tested.